22221222200120 has 16 divisors (see below), whose sum is σ = 49997749950360. Its totient is φ = 8888488880032.

The previous prime is 22221222200119. The next prime is 22221222200123. The reversal of 22221222200120 is 2100222212222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22221222200092 and 22221222200101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221222200123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277765277462 + ... + 277765277541.

Almost surely, 2^{22221222200120} is an apocalyptic number.

22221222200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221222200120 is an abundant number, since it is smaller than the sum of its proper divisors (27776527750240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22221222200120 is a wasteful number, since it uses less digits than its factorization.

22221222200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555530555014 (or 555530555010 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22221222200120 its reverse (2100222212222), we get a palindrome (24321444412342).

The spelling of 22221222200120 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred thousand, one hundred twenty".